Notes: The components or the complete system must not be emptied by unscrewing the pressure lines. Before removal, depressurize AIR-matic components (air suspension struts, air springs,damping valve units and main memory) using Star Diagnosis. Dirty pressure line connections should be cleaned prior to unscrewing. Do not use any cleaning solvents as this may damage the pressure lines or seals. When replacing earlier versions, some models may also require (1) 220 327 00 00 hose.